I second getting Steam. I recommend Spore, the Sam and Max series, Psychonauts, The Movies, Everyday Shooter, Indiana Jones and the Fate of Atlantis, Torchlight, etc. There's also a lot of non-steam games I'd recommend, like the Sim City series (preferably Sim City 4), The Sims, Diablo II, Starcraft(of course!), Age of Empires II, etc.